Mitsubishi Electric PUHY-P200 Service Handbook page 247

[ IX Troubleshooting ]
1. Error Code
6607
No ACK error
2. Error definition and error detection method
The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans-
mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.)
The address/attribute appeared on the display on the remote controller indicates the controller which did not provide
the response (ACK).
3. System configuration
(2) Grouping of units in a system with multiple outdoor units
Error
source Error display
address
Outdoor ME remote
unit controller (RC)
(OC) MA remote
controller (MA)
Indoor ME remote
unit controller (RC)
(IC) MA remote
controller (MA)
HWE10040
Detection
method
No acknowl- Same cause as that for sys-
edgement tem with one outdoor unit
(ACK) at IC
transmission to
OC
No acknowl- (1) Same causes as (1) - (5) for
edgement system with one outdoor unit
(ACK) at RC
transmission to
IC
(2) Disconnection or short circuit
of the transmission line for
the outdoor unit on the termi-
nal block for centralized con-
trol line connection (TB7)
(3) When multiple outdoor units
are connected and the pow-
er source of one of the out-
door units has been shut off.
(4) The male power supply con-
nector of the outdoor unit is
not connected to the female
power supply switch connec-
tor (CN40).
(5) The male power supply con-
nectors on 2 or more outdoor
units are connected to the fe-
male power supply switch
connector (CN40) for cen-
tralized control.
If an error occurs, after the
unit runs normally once, the
following causes may be
considered.
- 238 -
Cause
1)
2)
3)
Total capacity error
(7100)
Capacity code error
(7101)
Error in the number of
connected units (7102)
Address setting error
(7105)
Check method and remedy
Same remedy as that for sys-
tem with one outdoor unit
Turn off the power sources of
the outdoor and indoor units
for 5 or more minutes, and turn
them on again. If the error is
accidental, the will run normal-
ly.If not, check the cause 2).
Check the causes of (1) - (5). If
the cause is found, correct it. If
no cause is found, check 3).
Check the LED displays for
troubleshooting on other re-
mote controllers whether an
error occurs.
If an error is found,
-> If an error is found, check
the check code definition, and
correct the error.
If no error is found,
-> Indoor unit board failure
GB